jminusminus

Class JNegateOp

java.lang.Object

jminusminus.JAST

jminusminus.JStatement

jminusminus.JExpression

jminusminus.JUnaryExpression

jminusminus.JNegateOp

 class JNegateOp
extends JUnaryExpression

The AST node for a unary negation (-) expression.

Field Summary

Fields inherited from class jminusminus.JUnaryExpression

arg

Fields inherited from class jminusminus.JExpression

isStatementExpression, type

Fields inherited from class jminusminus.JAST

compilationUnit, line

Constructor Summary

Constructors

Constructor and Description
JNegateOp(int line, JExpression arg) Construct an AST node for a negation expression given its line number, and the operand.

Method Summary

Methods

Modifier and Type	Method and Description
JExpression	analyze(Context context) Analyzing the negation operation involves analyzing its operand, checking its type and determining the result type.
void	codegen(CLEmitter output) Generating code for the negation operation involves generating code for the operand, and then the negation instruction.

Methods inherited from class jminusminus.JUnaryExpression

writeToStdOut

Methods inherited from class jminusminus.JExpression

codegen, isStatementExpression, type

Methods inherited from class jminusminus.JAST

line, partialCodegen

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

JNegateOp

public JNegateOp(int line,
         JExpression arg)

Construct an AST node for a negation expression given its line number, and the operand.

Parameters:

line - line in which the negation expression occurs in the source file.

arg - the operand.

Method Detail

analyze

public JExpression analyze(Context context)

Analyzing the negation operation involves analyzing its operand, checking its type and determining the result type.

Specified by:

analyze in class JExpression

Parameters:

context - context in which names are resolved.

Returns:

the analyzed (and possibly rewritten) AST subtree.

codegen

public void codegen(CLEmitter output)

Generating code for the negation operation involves generating code for the operand, and then the negation instruction.

Specified by:

codegen in class JAST

Parameters:

output - the code emitter (basically an abstraction for producing the .class file).